SG121892G - Extended threshold analog to digital conversion apparatus for an rf receiver - Google Patents

Extended threshold analog to digital conversion apparatus for an rf receiver

Info

Publication number
SG121892G
SG121892G SG1218/92A SG121892A SG121892G SG 121892 G SG121892 G SG 121892G SG 1218/92 A SG1218/92 A SG 1218/92A SG 121892 A SG121892 A SG 121892A SG 121892 G SG121892 G SG 121892G
Authority
SG
Singapore
Prior art keywords
signal
analog
input signal
convertor
receiver
Prior art date
Application number
SG1218/92A
Original Assignee
Motorola Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of SG121892G publication Critical patent/SG121892G/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/20—Increasing resolution using an n bit system to obtain n + m bits
    • H03M1/201—Increasing resolution using an n bit system to obtain n + m bits by dithering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
    • H04B14/046—Systems or methods for reducing noise or bandwidth

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Analogue/Digital Conversion (AREA)
  • Circuits Of Receivers In General (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

A sample and hold circuit (10) receives a low level analog input signal and is gated by a clock (18). The output of the sample and hold circuit (10) is summed with a signal from a noise source (22) and the resulting signal coupled to an analog to digital (A/D) converter (24). The noise source (22) presents a bandwidth restricted signal having no substantial energy in the range of frequencies of the desired analog input signal. The clock (18) also drives the A/D convertor (24) which has a plurality of digital output signals (26) which correspond to varying analog signal levels. The resulting signal contains a signal component corresponding to the input signal which is converted into a digital representation by the A/D convertor (24) even though the magnitude of the input signal is less than the threshold sensitivity of the A/D convertor (24).
SG1218/92A 1984-04-20 1992-11-28 Extended threshold analog to digital conversion apparatus for an rf receiver SG121892G (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1984/000616 WO1985004995A1 (en) 1984-04-20 1984-04-20 Extended threshold analog to digital conversion apparatus for an rf receiver

Publications (1)

Publication Number Publication Date
SG121892G true SG121892G (en) 1993-02-19

Family

ID=22182125

Family Applications (1)

Application Number Title Priority Date Filing Date
SG1218/92A SG121892G (en) 1984-04-20 1992-11-28 Extended threshold analog to digital conversion apparatus for an rf receiver

Country Status (11)

Country Link
EP (1) EP0179056B1 (en)
JP (1) JPS61501120A (en)
AT (1) ATE55854T1 (en)
BR (1) BR8407328A (en)
DE (1) DE3483045D1 (en)
DK (1) DK557085A (en)
FI (1) FI854683A (en)
HK (1) HK39393A (en)
NO (1) NO855187L (en)
SG (1) SG121892G (en)
WO (1) WO1985004995A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2645280B1 (en) * 1988-01-22 1992-04-30 Thomson Csf RADAR RECEIVER, PARTICULARLY FOR RADAR HAVING A BEAM FORMING ANTENNA BY CALCULATION
US4958308A (en) * 1988-10-21 1990-09-18 Bio-Rad Laboratories, Inc. Technique for improving the resolution of an A/D converter
DE19514007C1 (en) * 1995-04-13 1996-09-12 Wandel & Goltermann Anti-distortion method for analogue=digital converters
US10789883B2 (en) * 2017-11-02 2020-09-29 Novatek Microelectronics Corp. Sensing apparatus for display panel and operation method thereof

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB873926A (en) * 1959-09-03 1961-08-02 Standard Telephones Cables Ltd Improvements in or relating to electric pulse code systems of communications
US3877022A (en) * 1973-05-14 1975-04-08 Weston Instruments Inc Enhancing resolution in analog-to-digital conversion by adding statistically controlled noise to the analog input signal
JPS5247918B2 (en) * 1973-06-04 1977-12-06
US3879724A (en) * 1973-11-19 1975-04-22 Vidar Corp Integrating analog to digital converter
JPS5197968A (en) * 1975-02-25 1976-08-28 Anarogu deijitaruhenkanki
US3999129A (en) * 1975-04-16 1976-12-21 Rolm Corporation Method and apparatus for error reduction in digital information transmission systems
GB1580178A (en) * 1975-12-11 1980-11-26 Post Office Digital measurement

Also Published As

Publication number Publication date
FI854683A0 (en) 1985-11-27
WO1985004995A1 (en) 1985-11-07
NO855187L (en) 1985-12-20
DK557085D0 (en) 1985-12-02
ATE55854T1 (en) 1990-09-15
DK557085A (en) 1985-12-02
FI854683A (en) 1985-11-27
HK39393A (en) 1993-04-30
EP0179056A1 (en) 1986-04-30
JPS61501120A (en) 1986-05-29
EP0179056B1 (en) 1990-08-22
BR8407328A (en) 1986-09-23
DE3483045D1 (en) 1990-09-27

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